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Finding the Fourth Proportional to 343,578.60, 515,756.70 and 203,416.20

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Solution

The fourth proportional to 343,578.60, 515,756.70 and 203,416.20 is: 305,354.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,578.60 : 515,756.70 = 203,416.20 : x
  2. Step 2: Convert to fraction form
    343,578.60/515,756.70 = 203,416.20/x
  3. Step 3: Cross multiply
    343,578.60x = 515,756.70 × 203,416.20
  4. Step 4: Simplify right side
    343,578.60x = 104,913,268,038.54
  5. Step 5: Solve for x
    x = 104,913,268,038.54/343,578.60
  6. Step 6: Final answer
    x = 305,354.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.